Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
dai khoa » da khoa, tai khoa, dac khoa
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ve coc » ve cuoc, ve cac, ve co
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang dai khoa. hieu ve coc luc va hanh ((day cua) OR (dai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang dai khoa. hieu ve coc luc va hanh ((day cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang dai khoa. hieu ve coc luc va hanh ((day cua) OR (dai cua)) tre*.